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A paraffin/polyacrylonitrile intelligent temperature-regulating nanofiber

A technology of polyacrylonitrile and intelligent temperature adjustment, which is applied in fiber processing, fiber chemical characteristics, filament/thread forming, etc., and can solve the problems of poor coating effect of phase change fibers, easy loss of phase change materials, and insufficient latent heat of phase change. Excellent and other problems, to achieve excellent mechanical properties, avoid easy loss, and prevent the effect of loss

Active Publication Date: 2021-12-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation methods of phase change fibers mainly include hollow fiber impregnation method, blend spinning method, microcapsule method, melt spinning method, chemical grafting method and wet spinning method, but they are prepared by impregnation filling method and blend spinning method. The coating effect of the phase change fiber is not good, and the phase change material is easy to lose, while the fiber prepared by chemical method and microcapsule method has better performance, but the latent heat of phase change is not good, and the fiber produced by melt spinning and wet spinning Both the performance and wrapping properties of the fiber meet the requirements of use, but the preparation process is relatively complicated and the preparation cost is high

Method used

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  • A paraffin/polyacrylonitrile intelligent temperature-regulating nanofiber
  • A paraffin/polyacrylonitrile intelligent temperature-regulating nanofiber
  • A paraffin/polyacrylonitrile intelligent temperature-regulating nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve the washed PAN in DMF, place it on a magnetic stirrer and stir for 12 hours to prepare a homogeneous electrospinning solution with a mass fraction of PAN of about 10%, which is used as a cortex fiber-forming material for temperature-regulated fibers.

[0033] (2) Eicosane and tetradecane, which is liquid at normal temperature, are miscible with each other, and the mass ratio is 1:5, which is used as the core layer phase change material of the temperature-regulating fiber.

[0034] (3) Use the PAN solution as the outer phase spinning solution, and use the eicosane / tetradecane mixed solution as the inner phase spinning solution, transfer it to the syringe and add it to the coaxial nozzle, and spin in a high-voltage electrostatic field, The nanofibers are received by a drum covered with tinfoil. The external positive and negative voltages of the coaxial nozzle and the receiving drum are 13kV and -1.5kV respectively, the receiving distance is about 15cm, the ou...

Embodiment 2

[0036] (1) Dissolve the washed PAN in DMF, place it on a magnetic stirrer and stir for 12 hours to prepare a homogeneous electrospinning solution with a mass fraction of PAN of about 12%, which is used as the cortex fiber-forming material of the temperature-regulated fiber.

[0037] (2) Eicosane and tetradecane, which is liquid at normal temperature, are miscible with each other, and the mass ratio is 1:5, which is used as the core layer phase change material of the temperature-regulating fiber.

[0038] (3) Use the PAN solution as the outer phase spinning solution, and use the eicosane / tetradecane mixed solution as the inner phase spinning solution, transfer it to the syringe and add it to the coaxial nozzle, and spin in a high-voltage electrostatic field. The nanofibers are received by a drum covered with tinfoil. The external positive and negative voltages of the coaxial nozzle and the receiving drum are 13kV and -1.5kV respectively, the receiving distance is about 15cm, th...

Embodiment 3

[0040] (1) Dissolve the washed PAN in DMF, place it on a magnetic stirrer and stir for 12 hours to prepare a homogeneous electrospinning solution with a mass fraction of PAN of about 15%, which is used as the cortex fiber-forming material of the temperature-regulated fiber.

[0041] (2) Eicosane and tetradecane, which is liquid at normal temperature, are miscible with each other, and the mass ratio is 1:5, which is used as the core layer phase change material of the temperature-regulating fiber.

[0042](3) Use the PAN solution as the outer phase spinning solution, and use the eicosane / tetradecane mixed solution as the inner phase spinning solution, transfer it to the syringe and add it to the coaxial nozzle, and spin in a high-voltage electrostatic field, The nanofibers are received by a drum covered with tinfoil. The external positive and negative voltages of the coaxial nozzle and the receiving drum are 13kV and -1.5kV respectively, the receiving distance is about 15cm, the...

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Abstract

The invention discloses a paraffin / polyacrylonitrile intelligent temperature-regulating nanofiber, which is a skin-core structure, the skin layer is a fiber-forming polymer, and the core layer is a mixed paraffin phase change material, and the skin layer is spun from an outer phase spinning liquid , the external spinning solution is a mixture of polyacrylonitrile and N,N-dimethylacetamide, the core layer is formed by spinning the internal spinning solution, and the internal spinning solution is n-eicosane Mixture with n-tetradecane. The invention has better spinnability, temperature control and wide application prospects.

Description

technical field [0001] The invention relates to the field of functional fibers, in particular to a paraffin / polyacrylonitrile intelligent temperature-regulating nanofiber. Background technique [0002] Temperature-regulating fiber is a kind of composite fiber with temperature-regulating function, which is made by wrapping phase-change material inside the fiber or coating and finishing it on the surface of the fiber. Phase change materials have been widely used in vehicle heat buffer, construction, greenhouse agricultural greenhouses, computer chips and textile fields. This phase change material is applied to textile fiber materials, and can effectively buffer the temperature change of the human body through the response of the phase change material to temperature changes, so that the body temperature remains constant within a certain period of time. [0003] At present, the preparation methods of phase change fibers mainly include hollow fiber impregnation method, blend spi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/08D01F8/18D01D5/34C09K5/06
CPCC09K5/063D01D5/34D01F8/08D01F8/18
Inventor 张明方旖旎陈佳伟伊利强姚菊明祝国成
Owner ZHEJIANG SCI-TECH UNIV
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